Stop mechanism



June 19,1923. 1,459,435

H. J. BOE ET AL STOP MECHANISM Filedpril 16. 1929 3 Sheets-Sheet 1 433'4 6563 44 InvenWs Heimer JBoe v 6/5 56? as in? June 19, 1923.1,459,435

H. J. BOE ET AL STOP MECHANISM Filed April 16 1920 3 Sheets-Sheet 2Patented June 19, 1923.

UNITED STATES- PATENT OFFICE.

HELMER J. son, or CHICAGO, AND BENJAMIN J, nennr, orBRO-OKFIELQ-ILLINOIS, ASSIGNORS TO WESTERN ELECTRIC COMPANY,INCORPORATED, on NEW YORK,

N. Y., A CORPORATION OF NEW YORK.

STOP MECHANISM.

Application filed April 16, 1920.

To all whom it may concern:

Be it known that we, HELMER J. Bon and BENJAMIN J. Ecnn'r, citizens ofthe United States, residing at Chicago, in the county of Cook and Stateof Illinois, and at Brookfield, in the county of Cook and State ofIllinois, respectively, have invented certain new and usefulImprovements in Stop Mechanisms, of which the following is a full,clear, concise, and exact description.

This invention relates to stop mechanisms, and more particularly to acombined registering and stop mechanism for use in cona trolling.different classes of machines.

The object of theinvention in general is to provide an improved stopmechanism for machines which may be set to accurately register therevolutions or reciprocations of the machine and to stop the machineafter 2 a predetermined number of revolutions or reciprocations.

In accordance with the general features of this invention there isprovided a mechanism comprising a plurality of rotatable parts adaptedto be moved from a set position to a zero or let-off position inresponse to a predetermined number of revolutions of a part and tooperate in their let-01f positions to control the stopping of themachine. More s ecifically, the invention comprises a plurality ofrotatable parts adapted to be successively driven at different speedsfrom a rotatable or reciprocating member and from a set to a zero orlet-off position, in which position they jointly control the operationof a stop mechanism for the machine with which it is associated.

In the drawings in which this mechanism is illustrated in connectionwith a strand operating mechanism:

Fig. 1 is a front elevation of the stop mechanism with a portion of thedriving shaft projecting therefrom;

Fig. 2 is a vertical cross section through the machine on the line 2-2of- Fig. 1;

Fig. 3 is a transverse partial sectional view taken on the line 3-3 ofFig. 2 with Serial No. 374,397.

Fig. 7 is a transverse partial sectional view taken on the line 77 of Fig. 2 with the parts shown in their normal position;

Fig. 8 is an. enlarged horizontal section taken on the line 88 of Fig.7;

Fig. 9 is a transverse partial sectional view taken on the line 99 ofFig. 2 with the1 parts shown in their normal position, an

Fig. 10 is a diagram of the electrical circuit controlled by the stopmechanism for stopping the driving motor.

The stop mechanism is mounted within a casing 20 provided with anopening 21 at one end through which extends a hollow shaft 22. Mountedloosely on the hollow shaft 22 intermediate its ends is a worm gear 23which is driven by a worm 24 mounted upon a shaft 25 which extendsthrough'the casing 20 and is connected by suitable gearing to thecapstan of the strand operating machine. The worm gear 23 is provided onone side with a bevel gear 26 which forms part of a differential 27. theopposite driving member of which is a bevel gear 28 provided with adisk-like portion 29 the peripheral surface ojf'which is provided with anotch 30, the normal position of which before and after an operation isas shown in Fig. '5. Bevel pinions 3131 mounted from a casing 32 of thedifferential, which is secured to the hollow shaft 22, form a drivingconnection between the bevel gears 26 and 28.

Rotatably mounted on the end of the hollow shaft 22, which extendsthrough the casing 20, is a setting member 33 equipped with a pointer 34which registers with a scale 35 marked on a plate 36. The scale 35 isused to set the mechanism for any len th of strand from one thousand tothirtyve thousand in even thousands. The plate 36 is provided with asecond scale 37 which is used to set the mechanism for any ength ofstrand under one thousand in multiples of ten. The setting member 33 isprovided with a cup shaped portion 40 which turns in tion.

the opening 21 of the casing 20 and is provided with a lug 41 on itsinside vertical surface. A locking screw 42 which extends through thecasing and engages the peripheral surface of the cup shaped portion 40holds the setting member 33 in a set posi- Rotatably mounted on a sleeve43 which is loose on the hollow shaft 22 and contacting with the sleeveportion of the setting member 33 is a ratchet wheel 44 equipped with adisk-like portion 45 the peripheral surface of which is provided with anotch 46, as more clearly shown in Fig. 3. Projecting from the side faceof the ratchet 44 is a lug 47 which'projects into the path of the lug41. Suitably mounted'within a hollow portion of the ratchet 44 is aspiral spring 50 which, when released, turns the ratchet in the oppositedirection to that in which it is turned by an associated driving pawl51. The driving pawl 51 is carried upon one end of a lever 52 which isrotatably mounted on the hollow shaft 22. Revolving with the bevel gear28 is a cam 53 which engages a roller 54 on the end of a verticallydisposed lever 55 pivoted to a'bracket 56. Pivoted to the lever 55intermediate the roller 54 and the bracket 56 is a short con- Iiectinglink 57 which connects the lower end.

of the lever 52 to the lever 55. Every revolution of the cam in thedirection indicated by the arrow in Fig. 3 will rock the lever 55 whichthrough the connecting link 57 will rock the lever 52 carrying the pawl51, thereby advancing the ratchet 44 one tooth in a direction oppositeto the movement of the cam 53. A retaining pawl 58 is suitably mountedfrom the casing 20 to retain the ratchet 44 in its advanced position.

A sleeve 60 carrying arms 61 and 62 is mounted below the ratchet 44 on asupporting stud 63 which is suitably secured to the casing 20. A coilspring 64 mounted around the sleeve 60 functions to keep the arms 61 and62 bearing upward. The arms 61 and 62 at their ends are each providedwith an upturned portion 65 and 66 which register respectively with thedisk-like portion 29 of the bevel gear 28 and the disk-like portion 45of the ratchet 44.

Within the hollow shaft 22 is a shaft 70 carrying at one-end an arm 71which has attached thereto a pointer 73. The pointer 73 registers withthe scale 37 marked on the plate 36 and is used to set the mechanism forany length of strand to be measured under one thousand feet in multiplesoften. A locking screw 75 is provided for locking the arm 71 when set.Secured to the opposite end of the shaft 70 is a member 76 of a clutch77 which is rotatably mounted on the hollow shaft 22 with the othermember 7 63 also slidable thereon. As shown in Figs. 2 and 7, the clutchmember 78 is equipped with pins 7 979 set 180 apart. Located on thehollow shaft 22 between the clutch menu ber 78 and the Worm gear 23 is aclutch composed of two members 83 and 84. The clutch member 83 isseceured to the shaft while the clutch member 84 is slidable thereon.The engaging faces of the members 83 and 84 have teeth 85 cut thereonand when the member 83 is turned, the member 84 will. be turned also.The clutch member 84 is provided with two openings 86 in its faceopposite to the teeth 85. are 180 apart and are adapted to register withthe pins 79-79 on the clutch member 78. A spring latch 88 functions tohold the member 84 in its normal position when it is not being revolvedby its associated member 83. A spring 88 interposed between the clutchmembers 83 and 84 functions to separate them when pins 79 and openings86 register. This is to allow the member 84 to be reset.

Slidable in suitable bearings in the casing 20 and below the hollowshaft 22 is a rod 89 which carries a shifting fork 90 for shifting theclutch member 7 8. A coil spring 91 on the rod 89 between the casing 20and the fork 90 serves to. move the rod 89 longitudi- The openings 86nally when released. One end of the rod 89 projects through the casingand in sliding, opens or closes a switch 92, the projecting end of therod 89 being equipped with an insulated tip 93.

A stop 94 secured to the rod 89 engages a downwardly projecting lug onthe arm 61 when the arm is in a set position, as shown p y the dottedposition of the arm 61 in ecured to the sleeve 43 is a disk-like member95 provided with a plurality of cam surfaces 96, 97, 98 and 99 and anoperating handle 100. The cam surface 99 cooperates with a lug 101 onthe rod 89 to shift it to open the switch 92 when resetting themechanism. The function of these cam surfaces and the handle will beexplained in the description of the operation of the clutch member 84 toits I normal position when released, whereupon it is locked by the latch88.

In Figs. 1 and 2 the mechanism is shown in a zero position. To set themechanism for say 18, 280 feet, the operator turns the 1 setting member33 in a clockwise direction to register the pointer 34 with a markrepresenting 18 on the scale 35, thereby setting the mechanism for18,000 feet. In moving the pointer 34 to the mark 18 the lug 41 is movedfrom the full line position shown in Fig. 3, which is the position ofthe parts after an operation, or the normal position, to the dottedposition. The setting of 280 feet is the next 0 ration, which is done byturning the arm 1 carrying the pointer 73 in a counter clockwisedirection until the pointer registers with a mark on the scale 37 whichrepresents 280 feet. As shown in Figs. 2 and 7, by turning the arm 71the clutch 77 which carries the pins 7 979 is turned also, therebysetting the pins such an angular distance from the opening 86in theclutch member 84 as will represent 280 feet. In Fig.7 the pins 79-79 andthe openings 86 are shown in full lines in a zero position, while thedotted line position of the pins 79 represents a positionset for 280feet. After setting the pointers 34 and 73 the lock screws 42 and 75respectively are set to secure them in position. After an operation ofthe mechanism it is necessary to reset the parts to their normalposition whether the same setting is used or a new setting, and this isdone after the resetting of the pointers. To reset the parts the handle100 is moved down against the action of the spring 50 from the full lineposition to the dotted position, as shown in Fig. 3, and then allowed toreturn.

In moving the handle 100 down, the cam 99 engages the lug 101 and shiftsthe rod 89 which through the fork 90 secured thereto draws the pins79from the openings 86 in the clutch member 84, thereby allowing themember 84 which has been disengaged from the member 83 by spring 88 toreturn to its 'zero position under the action of the spring drivenpinion 103, as shown in Fig. 7. The rod 89 in moving, opens the switch92 and thereafter is locked from moving back under the action of thespring 91 by a subsequent downward movement of the arm 61. The cam 98now coming into engagement with the arm 62 moves it downward, therebymoving the upturned portion 66 along with the arm 61 and its upturnedportion from the notches 46 and 30. This downward movement of the arms61 and 62 is completed just as the rod 89 completes its movement ofopening the switch 92 and drawing the pins 79 from the openings 86thereby locking the rod 89 from returning, due to the upward projectinglug 94 on the rod 89. The cams 96 and 97 in engaging the pawls 51 and 58move them away from the teeth on the ratchet 45, thereby allowing it andthe lug 47 thereon to revolve under the action of the spring 50 t0 brinthe lug 47 into contact with the lug 41. The notch 46 which is on theratchet is thereby moved away from the engagin end 66 of the arm 62which thereafter rides on the peripheral surface of the disk-likeportion 45 of the ratchet 44.

The worm gear 23 is geared down from the speed of the capstan on thestrand operating machine (not shown) to such a speed that it willrevolve one complete revolution for every thousand feet of strandpassing around the capstan. For every revolution of the worm 23 theratchet 44 is advanced one tooth through the cooperating cam 53 andparts 54, 55, 57, 52 and the pawl 51. The ratchet 44 has 35 teeth, onetooth for every thousand feet of strand passing around the capstan, andin setting the pointer 34 on the mark 18 on the scale 35 the notch 46 isset such a distance from the upturned portion 66 of the arm 62 as willallow the arm 62 to move into it after 17,000 feet of strand have passedaround the capstan. Since the notch 30 makes one complete revolution forevery thousand feet of strand operated upon the arm 61 has to be heldaway from the peripheral surface of the disk-like portion of the gear 29until after 17,000 feet of strand have been operated upon. At this timethe arm 62 enters the notch 46 thereby allowing the arm 61 to engage theperipheral surface of the disk-like portion of the gear 29 ready toenter the notch 30 at the end of 18,000 feet, thereby locking the bevelgear 28 of the differential 27 from further move ment. The locking ofthe bevel gear 28 causes the casing 32 of the differential to revolve,and being secured to the hollow shaft 22 causes it and the clutch 82secured thereto to revolve at the rate of one-half revolution perthousand feet. The spring latch 88 is forced to ride on the surface ofthe member 84 when the clutch 82 revolves. When this movement hasregistered the openings 86 in the clutch member 84 with the pins 79 ofthe clutch 77, which means that 280 feet of strand have passed aroundthe capstan in addition to 18,000 feet, the pins 79 will enter theopenings 86 and allow the rod 89 to move under the action of the spring91, thereby closing the switch 92 which operates a solenoid switch inthe circuit to stop the driving motor and therefore the machine. At theinstant the pin 79 and openings '86 register, the clutch members 83 and84 are disengaged through the action of the spring 88, thereby allowingthe member 84 under the action of the spring driven pinion 103 to returnto its n ot ch 30 oppositelthearm .61.: While operating thehand wheel.108 the handle lOO is held down to allow the member 84 to return orremain at itsstarting position. If the number of feet of strand to bemeas- :ured is in even thousands, the pointer 73 is placed at zero onthe scale 37 which places the pins 7 9 opposite the openings 86 so thatwhen the arm 61 moves into the notch 30 the step 94 is free and thisallows the rod 89 to move and thereby close the switch 92.

In the circuit diagram illustrated in Fig. 10. 113 represents agenerator or any suitable source of power for driving a motor 114 tooperate the strand operating machine.

' In starting the machine. after a measuring operation a push buttonswitch 115 is operated to close a circuit from the generator 113 throughconductor 116, the contacts of switch 115, through energizing coils 117ofa suitable solenoid switch 118, and conductor 119. back to thegenerator 113. The energization of the coils 117 attracts armatures 120,thereby closing a circuit from the generator 113 through conductor 121,contacts 122, and the armatures 120 to the motor 114.

When the contacts of the switch 92 are closed by the movement of the rod89 after a certain number of feet of strand have been measured, acircuit is closed through conductors 121, 123, associated energizingcoils 124, switch 92, and conductors 125 and 116 to the generator 113.The energization of the coils 124' attracts the armatures 120, therebyopening the circuit through the contacts 122 to the motor 114 andstopping the machine.

What is claimed is:

1. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism adapted tobe operated thereby, including a rotatable member and a rotatable andrecipro cable member adapted to be successively rotated from a set to azero or let-off position to register in units or fractions thereof thenumber of revolutions or reciprocations of the machine, a differentialdriving means for said rotatable member and rotatable and tudinally atthe zero position thereof, and stop mechanism for the machine controlledfro regiproca tions the, combination with the maoh-, ine..,of a 1registering mechanism comp rlsing a, pl rality of rotatable .members,

driv ng m ansjth fqr d ng ad fibr- 'ent l- .ife d irina in .sil ce ion.s ota:

i eb1 m mb t if iiasst teaz Po n to, register in.,units. ,or,- fractionsthereof the'number of revolutions or reciprocations of the machme,. means associated with one of said rotatable-men lbers and operated after apredetermined movement thereof .to shift the drive of'said differentialto said other rotatable member, and a stop member released by saidrotatable members in their zero or let-01f positions to control the stopI ping of the machine.

3. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism comprising aplurality of rotatable members, driving means therefor including adifferential adapted to drive in succession said rotatable members froma set to a zero position to register in units and fractions thereof thenumber of revolutions or reciprocations of the machine, and a stopmember released by said rotatable members in their zero position tocontrol the stopping of the machine.

4. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism adapted tobe operated thereby including a rotatable member anda rotatable andreciprocable member adapted to be successively rotated from a set to azero or let-off position to register in units and fractions thereof thenumber of revolutions or reciprocations of the machine, a differentialdriving means for said rotatable member and rotatable and reciprocablemember, means associated with one of said rotatable members andoperated! after a predetermined movement thereof to shift the drive ofsaid differential to said other rotatable member, means for moving saidrotatable and reciprocable member longitudinally at the zero positionthereof, and stop mechanism for the ma chine controlled by thelongitudinal movement of said rotatable and reciprocable member.

5. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism adapted tobe operated thereby including a rotatable member and a rotatable andreciprocable member adapted to be successively rotated from a set to azero or let-off position to register in units or fractions thereof thenumber of revolutions or reciprocations of the machine, a differentialdriving means for said rotatable member andsaid rotatable andreciprocable member, means associated with said rotatable member andoper ated after a predetermined movement thereof to shift the drive ofsaid differential to said rotatable and reciprocable member, ieans forn'loving said rotatable and reciprocable member longitudinally, at thezero position thereof, and stop mechanism for the machine controlledbythe longitudinal movement of said rotatable and reciprocable member.

6. In a registering mechanism, a plurality of rotatable members, adriving means therefor including a differential adapted to drive insuccession said rotatable members from a set to a zero position toregister in units and fractions thereof, and means for setting saidrotatable members for a predetermined number of revolutions. I

7. In a registering mechanism, a plurality of rotatable members, drivingmeans therefor including a differential for driving in succession saidrotatable members from a set to a zero position to register in units andfractions thereof, means associated with one of said rotatable membersand operated after a predetermined movement thereof to shift the driveof said difierential to said other rotatable member, and means forsetting said rotatable members for a predetermined number ofrevolutions.

8. In a registering mechanism, a plurality of rotatable members, drivingmeans therefor including a differential for driving in succession saidrotatable members from a set to a zero position to register in units andfractions thereof, one of said rotatable members carried thereby androtated to a predetermined position, means associated With saidrotatable member and operated at the completion of a predeterminedmovement thereof to shift the drive of said differential to said otherrotatable member, and means for setting said rotatable members for apredetermined number of revolutions.

9. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism adapted tobe operated thereby including a rotatable member and a rotatable andreciprocable member adapted to be successively rotated from a set to azero or let-oft position in the operation of the mechanism to registerin units and fractions thereof the number of] revolutions orreciprocations of the machine, means for moving said rotatable andreciprocable member longitudinally'at the zero position thereof, andstop mechanism for the machine controlled by the longitudinal movementof said rotatable and reciprocable member.

10. 111 a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination with the machine of a registering mechanism adapted tobe operated thereby including a plurality of rotatable members adaptedto be successively rotated at different speeds from a set to a zero orlet-off position in the operation of the mechanism to register in unitsand fractions thereof the number of revolutions or reciprocations, meansfor setting said members for the predetermined number of units andfractions thereof representing thousands, hundreds and fractions ofhundreds the number of revolutions or recipro cations of the machine,and a stop member released by said rotatable members in the zero orlet-off position of the registering mechanism to control the stopping ofthe machine.

11. In a mechanism for controlling the operation of a machine at thecompletion of a v predetermined number of revolutions or reciprocations,the combination With the machine of a registering mechanism adapted tobe operated thereby including a rotatable member and a rotatable andreciprocable member adapted to be successively rotated from a set to azero or let-off position in the operation of the mechanism to registerin units and fractions thereof the number of revolutions orreciprocations of the machine, means for setting said members for thepredetermined number of units and fractions thereof representingthousands, hundreds and fractions of hundreds the number of revolutionsor reciprocations of the machine, and means for moving said rotatableand reciprocable member longitudinally at the zero position thereof, andstop mechanism for the machine controlled by the longitudinal movementof said rotatable and reciprocable member.

12. In a mechanism for controlling the operation of a machine at thecompletion of a predetermined number of revolutions or reciprocations,the combination With the machine of a registering mechanism adapted tobe operated thereby including a rotatable member and a rotatable andreciprocable member adapted to be successively rotated at differentspeeds from a set to.a zero or let-off position in the operation of the-mechanism to register in units and fractions thereof the number ofrevolutions or reciprocations of the machine, means for automaticallyshifting the drive from one of said rotatable membes to the other at theend of a predetermined movement thereof, means for setting said membersfor the predetermined number of units or fractions thereof representingthousands, hundreds and fractions of hundreds the number of revolutionsor reciprocations of the machine, and means for moving said rotatableand rec-iprocable member longitudinally at the. 10 zero positionthereof, a stop member, and

means under the joint control of said rotatable members in their zeropositions for controlling the operation of said stop mem ber.

In Witness whereof, we hereunto subscribe our names this 30th day ofMarch, A. D., 1920, I

HELMERJ. BOE. BENJAMIN J. EGERT.

